فهرس المقالات Root Canal Therapy حرية الوصول المقاله صفحة الملخص نص كامل 1 - Prevalence of periapical periodontitis and its association with previous root canal treatment, root canal filling length and type of coronal restoration –based on CBCT Alireza Elsagh parisa ranjbarian Azadeh Torkzadeh Parisa Taheri